Spoiler Warning! Major plot or ending details may follow!
Dangoro's evolution, Satoshi VS Yacon
In his fifth Gym Battle in the Isshu region, Satoshi will use his Dangoro, the Mantle Pokémon, against Gym Leader Yacon's Doryuzu. During their battle, Dangoro has a hard time keeping up against Doryuzu at first. In process, it manages to evolve into Gantle and learns a new move. As a conclusion, the newly evolved Pokémon claims the victory.
In English, Satoshi is known as Ash, Yacon is known as Clay, Isshu is known as Unova, Dangoro is known as Roggenrola, Doryuzu is known as Excadrill and Gantle is known as Boldore.